Archipelago » qemu

/*

 *  Generic thunking code to convert data between host and target CPU

 * 

 *  Copyright (c) 2003 Fabrice Bellard

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

#ifndef THUNK_H

#define THUNK_H

#include <inttypes.h>

#include "config.h"

#ifdef HAVE_BYTESWAP_H

#include <byteswap.h>

#else

#define bswap_16(x) \

({ \

        uint16_t __x = (x); \

        ((uint16_t)( \

                (((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \

                (((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \

})

#define bswap_32(x) \

({ \

        uint32_t __x = (x); \

        ((uint32_t)( \

                (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \

                (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) <<  8) | \

                (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >>  8) | \

                (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \

})

#define bswap_64(x) \

({ \

        uint64_t __x = (x); \

        ((uint64_t)( \

                (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) << 56) | \

                (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) << 40) | \

                (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \

                (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) <<  8) | \

                (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) >>  8) | \

                (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \

                (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \

                (uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) >> 56) )); \

})

#endif

#ifdef WORDS_BIGENDIAN

#define BSWAP_NEEDED

#endif

/* XXX: autoconf */

#define TARGET_I386

#define TARGET_LONG_BITS 32

#if defined(__alpha__)

#define HOST_LONG_BITS 64

#else

#define HOST_LONG_BITS 32

#endif

#define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8)

#define HOST_LONG_SIZE (TARGET_LONG_BITS / 8)

static inline uint16_t bswap16(uint16_t x)

{

    return bswap_16(x);

}

static inline uint32_t bswap32(uint32_t x) 

{

    return bswap_32(x);

}

static inline uint64_t bswap64(uint64_t x) 

{

    return bswap_64(x);

}

static void inline bswap16s(uint16_t *s)

{

    *s = bswap16(*s);

}

static void inline bswap32s(uint32_t *s)

{

    *s = bswap32(*s);

}

static void inline bswap64s(uint64_t *s)

{

    *s = bswap64(*s);

}

#ifdef BSWAP_NEEDED

static inline uint16_t tswap16(uint16_t s)

{

    return bswap16(s);

}

static inline uint32_t tswap32(uint32_t s)

{

    return bswap32(s);

}

static inline uint64_t tswap64(uint64_t s)

{

    return bswap64(s);

}

static void inline tswap16s(uint16_t *s)

{

    *s = bswap16(*s);

}

static void inline tswap32s(uint32_t *s)

{

    *s = bswap32(*s);

}

static void inline tswap64s(uint64_t *s)

{

    *s = bswap64(*s);

}

#else

static inline uint16_t tswap16(uint16_t s)

{

    return s;

}

static inline uint32_t tswap32(uint32_t s)

{

    return s;

}

static inline uint64_t tswap64(uint64_t s)

{

    return s;

}

static void inline tswap16s(uint16_t *s)

{

}

static void inline tswap32s(uint32_t *s)

{

}

static void inline tswap64s(uint64_t *s)

{

}

#endif

#if TARGET_LONG_SIZE == 4

#define tswapl(s) tswap32(s)

#define tswapls(s) tswap32s((uint32_t *)(s))

#else

#define tswapl(s) tswap64(s)

#define tswapls(s) tswap64s((uint64_t *)(s))

#endif

#if TARGET_LONG_SIZE == 4

typedef int32_t target_long;

typedef uint32_t target_ulong;

#elif TARGET_LONG_SIZE == 8

typedef int64_t target_long;

typedef uint64_t target_ulong;

#else

#error TARGET_LONG_SIZE undefined

#endif

/* types enums definitions */

typedef enum argtype {

    TYPE_NULL,

    TYPE_CHAR,

    TYPE_SHORT,

    TYPE_INT,

    TYPE_LONG,

    TYPE_ULONG,

    TYPE_PTRVOID, /* pointer on unknown data */

    TYPE_LONGLONG,

    TYPE_ULONGLONG,

    TYPE_PTR,

    TYPE_ARRAY,

    TYPE_STRUCT,

} argtype;

#define MK_PTR(type) TYPE_PTR, type

#define MK_ARRAY(type, size) TYPE_ARRAY, size, type

#define MK_STRUCT(id) TYPE_STRUCT, id

#define THUNK_TARGET 0

#define THUNK_HOST   1

typedef struct {

    /* standard struct handling */

    const argtype *field_types;

    int nb_fields;

    int *field_offsets[2];

    /* special handling */

    void (*convert[2])(void *dst, const void *src);

    int size[2];

    int align[2];

    const char *name;

} StructEntry;

/* Translation table for bitmasks... */

typedef struct bitmask_transtbl {

        unsigned int        x86_mask;

        unsigned int        x86_bits;

        unsigned int        alpha_mask;

        unsigned int        alpha_bits;

} bitmask_transtbl;

void thunk_register_struct(int id, const char *name, const argtype *types);

void thunk_register_struct_direct(int id, const char *name, StructEntry *se1);

const argtype *thunk_convert(void *dst, const void *src, 

                             const argtype *type_ptr, int to_host);

unsigned int target_to_host_bitmask(unsigned int x86_mask, 

                                    bitmask_transtbl * trans_tbl);

unsigned int host_to_target_bitmask(unsigned int alpha_mask, 

                                    bitmask_transtbl * trans_tbl);

#endif